Birchbox Breakdown

Ever since we watched the first season of “Gossip Girl,” we’ve been huge fans of Blake Lively’s flowing waves. So we were excited to learn that the blonde actress was the inspiration behind Kérastase’s new serum. Specially designed for long hair, the leave-in treatment adds a high-definition shine while sealing each cuticle (bye bye, split ends). Plus, the light, gorgeously scented formula won’t weigh down your strands.

How to Use

This luxe serum is made with sophisticated light reflectors to add mega-gloss and shine while smoothing away frizz. A generous amount of aloe vera—high in natural amino acids and vitamins—softens and restores dry, brittle ends (the number one problem for girls with long locks).

Most Helpful Customer Reviews

My favorite hair serum!!!

I use a lot of hair serums or leave ins but this is certainly the best. The smell is divine, and the shine from just one use is kind of unbelievable. Just a couple of drops does the trick and I even notice my husband likes to smell my hair more which is hilarious but welcome.

5

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Reviewer1

Age

25-34

Beauty style

Classic, Trendy

Hair color

Red

Hair type

Fine, Oily, Straight

Love

This beauty product is a part of my every day routine. The serum leaves my hair feeling weightless and smooth. I've also noticed a difference in the number of split ends in getting. My hair has definitely improved since using this product.

5

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Awesome!

Was hoping this lived up to the price and it did! I have long straight fine hair and I used two pumps and it didn't weigh my hair down at all. It was super soft and shiny. So glad I bit the bullet and bought it.

5

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